PHOTOCATALYTIC WATER-TREATMENT ON IMMOBILIZED TIO2 COMBINED WITH OZONATION

The degradation of acetic acid, monochloroacetic acid and dimethyl-2,2 ,2-trichloro-1-hydroxyethylphosphonate (DEP) by ozonation on illuminat ion was enhanced considerably by the incorporation of photocatalyst. T his effect was smaller for the degradation of phenol. However, interme diate organic acids formed during the degradation of phenol disappeare d rapidly with the incorporation of photocatalyst. It is suggested tha t the effect of the photocatalyst is larger on the degradation of hydr ophilic compounds than aromatic compounds.